The Accelerated Reader software, according to this study, offers computerized comprehension quizzes of real books individually chosen by children, giving children (and teachers, librarians, and parents) feedback on performance. Children can also express preferences for books they enjoy. Quizzes taken by 150,220 children in 967 schools are reported. Considering highly preferred books, children were reading very difficult books with a high degree of success. Non-fiction books were not read or understood as carefully as fiction books. Implications for future research and practice are outlined as well.
Topping, K. J. (2014). Fiction and non-fiction reading and comprehension in preferred books. Reading Psychology, 36(4), 350-387. https://dx.doi.org/10.1080/02702711.2013.865692